FR2745643B1 - WIDE ANGLE VARIABLE FOCAL LENS SYSTEM - Google Patents

WIDE ANGLE VARIABLE FOCAL LENS SYSTEM

Info

Publication number
FR2745643B1
FR2745643B1 FR9702509A FR9702509A FR2745643B1 FR 2745643 B1 FR2745643 B1 FR 2745643B1 FR 9702509 A FR9702509 A FR 9702509A FR 9702509 A FR9702509 A FR 9702509A FR 2745643 B1 FR2745643 B1 FR 2745643B1
Authority
FR
France
Prior art keywords
lens system
wide angle
variable focal
angle variable
focal lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
FR9702509A
Other languages
French (fr)
Other versions
FR2745643A1 (en
Inventor
Chikara Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujinon Corp
Original Assignee
Fuji Photo Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Publication of FR2745643A1 publication Critical patent/FR2745643A1/en
Application granted granted Critical
Publication of FR2745643B1 publication Critical patent/FR2745643B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
    • G02B15/1445—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative
    • G02B15/144511—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative arranged -+-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
FR9702509A 1996-03-04 1997-03-03 WIDE ANGLE VARIABLE FOCAL LENS SYSTEM Expired - Fee Related FR2745643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP07515896A JP3310854B2 (en) 1996-03-04 1996-03-04 Wide zoom lens
DE19717120A DE19717120A1 (en) 1996-03-04 1997-04-23 Wide angle variable focus lens group for C.C.D.

Publications (2)

Publication Number Publication Date
FR2745643A1 FR2745643A1 (en) 1997-09-05
FR2745643B1 true FR2745643B1 (en) 1999-04-16

Family

ID=26036029

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9702509A Expired - Fee Related FR2745643B1 (en) 1996-03-04 1997-03-03 WIDE ANGLE VARIABLE FOCAL LENS SYSTEM

Country Status (4)

Country Link
US (1) US5805350A (en)
JP (1) JP3310854B2 (en)
DE (2) DE19708523C2 (en)
FR (1) FR2745643B1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10268193A (en) * 1997-03-24 1998-10-09 Fuji Photo Optical Co Ltd Zoom lens
JPH10333034A (en) 1997-06-03 1998-12-18 Olympus Optical Co Ltd Optical system
US6191896B1 (en) * 1997-09-04 2001-02-20 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JPH1195098A (en) * 1997-09-16 1999-04-09 Nitto Kogaku Kk Projection zoom lens and projector device
US5963377A (en) * 1997-10-02 1999-10-05 Minolta Co., Ltd. Taking optical system for video shooting
JP4392901B2 (en) * 1999-05-26 2010-01-06 キヤノン株式会社 Zoom lens
US6137638A (en) * 1999-07-28 2000-10-24 Nittoh Kogaku K.K. Projection zoom lens system and projector apparatus
US6545819B1 (en) * 1999-08-31 2003-04-08 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JP3847506B2 (en) * 1999-12-21 2006-11-22 オリンパス株式会社 Zoom lens
JP3503631B2 (en) 2001-04-27 2004-03-08 セイコーエプソン株式会社 Projection zoom lens and projector having the same
JP4048904B2 (en) * 2002-10-08 2008-02-20 ソニー株式会社 Imaging lens
JP2005055496A (en) * 2003-08-05 2005-03-03 Olympus Corp Variable power optical system
JP4792779B2 (en) 2005-03-29 2011-10-12 株式会社ニコン Zoom lens
GB2431247B (en) * 2005-10-14 2007-11-07 Foxlink Image Tech Co Ltd Zoom lens system
JP2007271697A (en) * 2006-03-30 2007-10-18 Fujinon Corp Zoom lens for projection and projection type display device
JP5415036B2 (en) * 2008-07-24 2014-02-12 富士フイルム株式会社 Projection variable focus lens and projection display device
JP5244498B2 (en) * 2008-08-14 2013-07-24 富士フイルム株式会社 Projection variable focus lens and projection display device
TW201037352A (en) * 2009-04-10 2010-10-16 Young Optics Inc Fixed-focus lens
TWI530710B (en) 2015-04-24 2016-04-21 中強光電股份有限公司 Projection apparatus and projection lens

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607069A5 (en) * 1975-09-29 1978-11-30 Bertele Ludwig
AT348790B (en) * 1977-10-28 1979-03-12 Eumig PANRATIC LENS
JPS5895315A (en) * 1981-11-30 1983-06-06 Minolta Camera Co Ltd High variable magnification zoom lens system containing wide angle area
JPS6087312A (en) * 1983-10-20 1985-05-17 Ricoh Co Ltd Very wide angle zoom lens with large power variation
US5329401A (en) * 1991-01-11 1994-07-12 Nikon Corporation Super wide angle zoom lens
JP2516522B2 (en) * 1992-04-21 1996-07-24 株式会社エルモ社 Wide zoom lens

Also Published As

Publication number Publication date
DE19708523C2 (en) 2002-11-28
DE19708523A1 (en) 1997-11-06
US5805350A (en) 1998-09-08
DE19717120A1 (en) 1998-10-29
FR2745643A1 (en) 1997-09-05
JPH09243917A (en) 1997-09-19
JP3310854B2 (en) 2002-08-05

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Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
ST Notification of lapse

Effective date: 20091130